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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++03
// <system_error>
// template <> struct is_error_code_enum<> : public false_type {};
#include <system_error>
#include <string>
#include "test_macros.h"
template <bool Expected, class T>
void
test()
{
static_assert((std::is_error_code_enum<T>::value == Expected), "");
#if TEST_STD_VER > 14
static_assert((std::is_error_code_enum_v<T> == Expected), "");
ASSERT_SAME_TYPE(decltype(std::is_error_code_enum_v<T>), const bool);
#endif
}
class A {
A();
operator std::error_code () const { return std::error_code(); }
};
// Specialize the template for my class
namespace std
{
template <>
struct is_error_code_enum<A> : public std::true_type {};
}
int main(int, char**)
{
test<false, void>();
test<false, int>();
test<false, std::nullptr_t>();
test<false, std::string>();
test<true, A>();
return 0;
}
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